If I mark it in the following way (see attachment 2) through the visual selector, will that do the trick or will I be notified about updates on the other topics too?
As you can see, the generated selector (in my screenshot) is [title*=‘Corporation’] which is pretty robust & takes into account the word “Corporation” associated with Corporation Tax.
The screenshot also shows how you can change the selector using the Distill Web App.
I hope that helps address your question.